Bitmap Class Map Macros

The bitmap class map macros are provided to assist in connecting the different LEADTOOLS C++ Class Library classes with classes you derive from LBitmap or LBitmapBase. The mapped classes are created "on demand", that is, no class object will be created if you do not request that class object from the bitmap object.

Connecting different LEADTOOLS C++ Class Library classes to the bitmap class object makes it easy to use these classes with the object when programming applications.

Every LEADTOOLS C++ Class Library class you derive from these bitmap classes must declare a class map. This is done through the LEAD_DECLARE_CLASS_MAP() macro in the header file that contains the declaration for the derived class. In the implementation file for that class the user must use the LEAD_START_CLASS_MAP(ClassName,ClassParent) , LEAD_INIT_(ClassName) and LEAD_END_CLASS_MAP(ClassName,ClassParent) macros respectively.

Class maps completely support inheritance. If a mapped class is not found then the mapped class of the parent class will be used. Any inherited classes will use the newly mapped classes or the parent mapped classes if the child does not have a mapped class of the same type. This gives you flexibility in programming your applications while using different class maps for each derived bitmap class.

LEAD_DECLARE_CLASS_MAP

LEAD_START_CLASS_MAP

LEAD_END_CLASS_MAP

LEAD_INIT_xxxx

START_BITMAP_CHANGING

END_BITMAP_CHANGING

LDictionary_GetBitmapCount

LDictionary_GetBitmap

LDictionary_DisconnectBitmapList

LDictionary_IsBitmap

LEAD_DECLARE_CLASS_MAP():

Use this macro to declare a class map for your derived LEAD bitmap class. This macro will declare different functions that you can use to get the corresponding mapped class object. The functions that this macro declares are:

virtual LDialogBase*

 DialogBase(); //for the mapped LDialogBase or derived class

virtual LDialogImage *

 DialogImage(); //for the mapped LDialogImage or derived class

virtual LDialogFile *

 DialogFile(); //for the mapped LDialogFile or derived class

virtual *

 DialogImageEffect(); //for the mapped LDialogImageEffect or derived class

virtual LDialogColor *

 DialogColor(); //for the mapped LDialogColor or derived class

virtual LDialogDocument *

 DialogDocument(); //for the mapped LDialogDocument or derived class
virtual LDialogWeb DialogWeb(); //for the mapped LDialogWeb or derived class
virtual LDialogEffect DialogEffect(); //for the mapped LDialogEffect or derived class

virtual LMarker

 Marker(); //for the mapped LMarker or derived class

Virtual LBitmapRgn

 Region(); //for the mapped LBitmapRgn or derived class
virtual LPaint Paint(); //for the mapped LPaint or derived class

virtual LPaintEffect

 PaintEffect(); //for the mapped LPaintEffect or derived class

virtual LTwain *

 Twain(); //for the mapped LTwain or derived class
virtual LMemoryFile MemoryFile(); //for the mapped LMemoryFile or derived class

virtual LFile

 File(); //for the mapped LFile or derived class
virtual LPrint Print(); //for the mapped LPrint or derived class

virtual LScreenCapture

 ScreenCapture(); //for the mapped LScreenCapture or derived class

virtual LBarCode

 BarCode(); //for the mapped LBarCode or derived class.

Example:
For example in the header file of the LBitmapBase LEAD bitmap declaration this macro is used as follows:

class LBitmapBase: public LBase 
{ 
   LEAD_DECLARE_CLASS_MAP(); 
   //. 
   //. 
   //. 
}

LEAD_START_CLASS_MAP(ClassName,ClassParent):

Use this macro to start your class map implementation for your derived LEAD bitmap class object. This is done in the implementation file of your bitmap class.

Example:
For example in the LEADTOOLS C++ Class Library class LBitmapBase implementation, this macro is used as follows:

LEAD_START_CLASS_MAP(LBitmapBase,LBase)

For the user derived bitmap class (LUserBitmap)

LEAD_START_CLASS_MAP(LUserBitmap,LParentBitmapClassName)   
LEAD_END_CLASS_MAP(LUserBitmap,LParentBitmapClassName)

LEAD_END_CLASS_MAP(ClassName,ClassParent):

Use this macro to end your class map implementation for your derived LEAD bitmap class object. This is done in the implementation file of your bitmap class.

Example:
For example in the LEADTOOLS C++ Class Library class LBitmapBase implementation, this macro is used as follows:

LEAD_START_CLASS_MAP(LBitmapBase,LBase)   
LEAD_END_CLASS_MAP(LBitmapBase,LBase)

For the user derived bitmap class (LUserBitmap)

LEAD_START_CLASS_MAP(LUserBitmap,LParentBitmapClassName)   
LEAD_END_CLASS_MAP(LUserBitmap,LParentBitmapClassName)

LEAD_INIT_xxx (ClassName):

Use these macros in your class map implementation of your derived LEAD bitmap class object to map different classes to your bitmap object. This is done in the implementation file of your bitmap class.

The available LEAD_INIT_xxx macros are:

LEAD_INIT_LFile() 

to map a LFile class

LEAD_INIT_LTwain() 

to map a LTwain class

LEAD_INIT_LPrint() 

to map a LPrint class

LEAD_INIT_LPaint() 

to map a LPaint class

LEAD_INIT_LDiaolgBase()

to map a LDialogBase class

LEAD_INIT_LDiaolgImage()

to map a LDialogImage class

LEAD_INIT_LDiaolgWeb()

to map a LDialogWeb class

LEAD_INIT_LDiaolgColor()

to map a LDialogColor class

LEAD_INIT_LDiaolgImageEffect()

to map a LDialogImageEffect class

LEAD_INIT_LDiaolgDocument()

to map a LDialogDocument class

LEAD_INIT_LDiaolgEffect()

to map a LDialogEffect class

LEAD_INIT_LDiaolgFile()

to map a LDialogFile class

LEAD_INIT_LMarker(LMarker)

to map a LMarker class.

LEAD_INIT_LDiaolg() 

to map a LDialog class

LEAD_INIT_LBitmapRgn() 

to map a LBitmapRgn class

LEAD_INIT_LMemoryFile() 

to map a LMemoryFile class

LEAD_INIT_LPaintEffect() 

to map a LPaintEffect class

LEAD_INIT_LScreenCapture() 

to map a LScreenCapture class

LEAD_INIT_LBarCode() 

to map a LBarCode class

Example:
For example in the LEADTOOLS C++ Class Library class LBitmapBase implementation, these macros are used as follows:

LEAD_START_CLASS_MAP(LBitmapBase,lbase)

LEAD_INIT_LFile(LFile)

to map a LFile class to the LBitmapBase class

LEAD_INIT_LTwain(LTwain) 

to map a LTwain class to the LBitmapBase class

LEAD_INIT_LPrint(LPrint)

to map a LPrint class to the LBitmapBase class

LEAD_INIT_LPaint(LPaint)

to map a LPaint class to the LBitmapBase class

LEAD_INIT_LDiaolgBase( LDialogBase)

to map a LDialogBase class to the LBitmapBase class

LEAD_INIT_LDiaolgImage( LDialogImage)

to map a LDialogImage class to the LBitmapBase class

LEAD_INIT_LDiaolgEffect ( LDialogEffect)

to map a LDialogEffect class to the LBitmapBase class

LEAD_INIT_LDiaolgWeb( LDialogWeb)

to map a LDialogWeb class to the LBitmapBase class

LEAD_INIT_LDiaolgColor( LDialogColor)

to map a LDialogColor class to the LBitmapBase class

LEAD_INIT_LDiaolgImageEffect( LDialogImageEffect)

to map a LDialogImageEffect class to the LBitmapBase class

LEAD_INIT_LDiaolgFile( LDialogFile)

to map a LDialogFile class to the LBitmapBase class

LEAD_INIT_LDiaolgDocument( LDialogDocument)

to map a LDialogDocument class to the LBitmapBase class

LEAD_INIT_LMarker(LMarker)

to map a LMarker class to the LbitmapBase class

LEAD_INIT_LBitmapRgn(LBitmapRgn)

to map a LBitmapRgn class to the LBitmapBase class

LEAD_INIT_LMemoryFile(LMemoryFile)

to map a LMemoryFile class to the LBitmapBase class

LEAD_INIT_LPaintEffect(LPaintEffect)

to map a LPaintEffect class to the LBitmapBase class

LEAD_INIT_LScreenCapture(LScreenCapture)

to map a LScreenCapture class to the LBitmapBase class

LEAD_INIT_LBarCode(LBarCode) 

to map a LBarCode class to the LBitmapBase class

LEAD_END_CLASS_MAP(LBitmapBase,lbase)

For the user derived bitmap class (LUserBitmap)

LEAD_START_CLASS_MAP(LUserBitmap, LBitmapBase)

LEAD_INIT_LFile(LUserFile) 

to map a LUserFile class to the LBitmapBase class

LEAD_INIT_LPrint(LUserPrint) 

to map a LUserPrint class to the LBitmapBase class

LEAD_END_CLASS_MAP(LUserBitmap,LBitmapBase)

Now executing the following:

LUserBitmap UserBitmap;

UserBitmap.File();

this returns a pointer to a LFile object

UserBitmap.Paint();

this returns a pointer to a LPaint object

UserBitmap.Print();

this returns a pointer to a LPrint object

UserBitmap.Region();

this returns a pointer to a LBitmapRgn object

UserBitmap.PaintEffect();

this returns a pointer to a LPaintEffect object

UserBitmap.MemoryFile();

this returns a pointer to a LMemoryFile object

START_BITMAP_CHANGING(pLBitmap,nNotifyCode,nNotifyCatigory)

Use this macro to fire a changing notification for the passed bitmap object before executing the function that will change the bitmap. If the StartChanging notification callback returns an error code then this macro will end the calling function and return with the same error code.

END_BITMAP_CHANGING(pLBitmap,nNotifyCode,nNotifyCatigory,nRetCode)

Use this macro to fire a changing notification for the passed bitmap object after executing the function that changed the bitmap. This will notify the bitmap object that the function completed execution.

LDictionary_GetBitmapCount()

Use this macro to get the current number of LEADTOOLS C++ Class Library created bitmap objects.

LDictionary_GetBitmap(nIndex)

Use this macro to get a pointer to a LEADTOOLS C++ Class Library bitmap object. The returned pointer is of type LBitmapBase *.

LDictionary_DisconnectBitmapList(pLBitmaplist)

Use this macro to disconnect a LEADTOOLS C++ Class Library bitmap object from the specified bitmap list object.

LDictionary_IsBitmap(pLBitmap)

Use this macro to check for a valid LEADTOOLS C++ Class Library bitmap object. This macro takes a pointer to the bitmap object to be verified.

Help Version 19.0.2017.10.27
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